Remember me functionality added and tested.

Merge extra.

Fixed comment.

app/notify_client/user_api_client.py

@@ -1,7 +1,7 @@
 from notifications_python_client.notifications import BaseAPIClient
 from notifications_python_client.errors import HTTPError
 
-from flask.ext.login import UserMixin
+from flask.ext.login import (UserMixin, login_fresh)
 
 
 class UserApiClient(BaseAPIClient):
@@ -100,6 +100,12 @@ class User(UserMixin):
     def is_active(self):
         return self.state == 'active'
 
+    def is_authenticated(self):
+        # To handle remember me token renewal
+        if not login_fresh():
+            return False
+        return super(User, self).is_authenticated()
+
     @property
     def id(self):
         return self._id